How Mortgage Rates Work (and Whether Buying Points Is Worth It)

The mortgage rate is the one number in home buying everyone watches and almost nobody understands. The rate on the news isn't the rate you'll get, the rate you're quoted isn't the whole cost, and the lender's offer to "buy the rate down" is either a smart move or a waste of thousands of dollars depending on math most buyers never run. Here's how rates are actually set, what determines yours, and a plain answer to the points question.

Where mortgage rates come from

Mortgage rates aren't set by the Federal Reserve, despite the headlines. The Fed sets a short-term rate that banks charge each other overnight. Thirty-year mortgage rates track something else: the yield on long-term bonds, especially the 10-year Treasury and the mortgage-backed securities that lenders sell your loan into after closing. When investors expect inflation or strong growth, those yields rise and mortgage rates follow; when they expect the opposite, rates fall. The Fed influences that indirectly, which is why rates sometimes move before a Fed decision and barely react to the decision itself.

The practical takeaway: nobody can reliably predict where rates will be in three months, including your lender. Plan around the rate you can get today, not the one you hope to get later.

Why your rate isn't the headline rate

The rate you see quoted online is a national average for a hypothetical borrower — usually excellent credit, 20% down, a single-family primary residence, and sometimes with points already baked in. Your rate is built from that starting point with adjustments for risk. The main factors:

• Credit score. The biggest lever after the loan type. The difference between a 640 and a 760 score can be well over half a percentage point on a conventional loan.
• Down payment / loan-to-value. More equity, lower rate. The pricing breaks tend to fall at 5%, 10%, 15%, 20%, and 25% down.
• Loan type. FHA, VA, and USDA loans are government-backed and often carry lower base rates than conventional, though with their own insurance or funding fees. Our loan types guide compares them.
• Loan term. A 15-year loan carries a lower rate than a 30-year, at the cost of a much higher payment.
• Property and occupancy. A primary residence gets the best pricing. Second homes, investment properties, condos, and manufactured homes all price higher.
• Lock period. A longer rate lock costs slightly more than a shorter one.
• Points and credits. Covered below — this is the part you control at the table.

Two borrowers buying the same house on the same day can be quoted rates a full point apart, and both quotes are "the market rate." Getting pre-approved is how you find out what your rate looks like.

Rate vs. APR

Every quote shows two numbers. The interest rate is what the loan balance accrues at. The APR (annual percentage rate) folds in the lender's fees — origination, points, some closing costs — and expresses the total cost as a yearly rate. A loan with a 6.25% rate and a 6.6% APR has meaningful fees behind it; one with a 6.25% rate and a 6.3% APR doesn't.

APR is useful for comparing two loans of the same type and term. It's less useful for deciding whether you'll actually pay those fees, because APR assumes you keep the loan for its full term — and almost nobody does. Which brings us to points.

What discount points are

A discount point is prepaid interest: you pay the lender 1% of the loan amount up front at closing, and in exchange the lender lowers your rate. The usual trade is roughly 0.25 percentage points of rate per point, though it varies by lender and market — sometimes a point buys more, sometimes less, and the first point is often a better deal than the second.

Points are a bet that you'll keep the loan long enough for the monthly savings to pay back the up-front cost. The way to evaluate the bet is the break-even.

The break-even math

Take a $250,000 loan over 30 years. Say the lender offers 6.50% with no points, or 6.25% for one point ($2,500).

• Principal and interest at 6.50%: about $1,580 a month
• Principal and interest at 6.25%: about $1,539 a month
• Monthly savings: about $41
• Break-even: $2,500 ÷ $41 ≈ 61 months, or just over five years

If you keep this loan — not just the house, the loan — for more than five years, the point pays for itself and everything after that is savings (about $12,000 over the remaining term). If you sell, refinance, or pay it off sooner, you paid $2,500 for less than $2,500 of benefit.

Run this with your own numbers. Any lender will give you a quote with and without points, and the formula is just cost of points ÷ monthly savings = months to break even.

When points make sense — and when they don't

Buying points tends to make sense when:

• You're confident you'll stay in the home and the loan well past the break-even — this is the forever house, not the starter.
• Rates are unlikely to drop enough to make a refinance attractive, so you won't be tempted to replace the loan.
• You have cash beyond the down payment and reserves, and the seller is contributing to closing costs. Seller credits can be used to buy points, which turns the seller's money into a permanently lower rate for you.

Points tend not to make sense when:

• You might move, refinance, or pay the loan off within five to seven years. Most first-time buyers do.
• The cash would leave you without reserves. A lower rate is not worth an empty emergency fund in a state where the roof matters as much as it does here.
• Rates are high and widely expected to fall. You'd pay for a rate you're planning to refinance away.
• A bigger down payment would move you across a pricing break (say, from 15% to 20% down, eliminating mortgage insurance). That's often a better use of the same dollars.

Lender credits: points in reverse

You can run the trade backwards. A lender credit means you accept a higher rate in exchange for the lender covering some of your closing costs. If cash to close is your constraint, this can get you into the house sooner; the price is a permanently higher payment. The same break-even logic applies, inverted: the shorter you'll keep the loan, the better a lender credit looks.

Temporary buydowns

You may see an offer for a "2-1 buydown" or similar, especially from builders or as a seller concession. That's not discount points. A temporary buydown pre-funds a lower payment for the first year or two (2 points below the note rate in year one, 1 point in year two), after which the payment steps up to the full rate. It helps with the first years' cash flow, but you have to qualify for — and eventually pay — the full rate. Make sure you're comfortable with the payment in year three before you take the discount in year one.

Locking your rate

A quote isn't a rate until it's locked. A rate lock is the lender's commitment to a specific rate for a specific window — commonly 30, 45, or 60 days — while your loan is processed. A few things to know:

• Lock once you're under contract, or as soon as your closing date is set. Floating an unlocked rate is a gamble in both directions.
• Match the lock to your closing date with a few days of cushion. If the closing slips past the lock, extensions cost money, and a lapsed lock reprices at the current market.
• Ask about a float-down. Some lenders let you take a lower rate once during the lock if the market drops, usually for a fee. Worth asking, not worth paying much for.
• Get it in writing. The lock confirmation shows the rate, the points, and the expiration.

How to shop the rate

Quotes move daily, so compare lenders on the same day using the standardized Loan Estimate each one is required to give you. Line up the rate, the points (Section A of the estimate), the lender fees, and the APR. Ask each lender for the same scenario — same points, same lock period — so you're comparing like to like. Three quotes is usually enough to see where the market is and who's padding fees.

Then remember that the rate is one line in a bigger payment. In Louisiana, insurance can swing the monthly number more than a quarter-point of rate ever will, and what you can afford is a function of the whole payment, not just the loan.

The bottom line

Mortgage rates track the bond market, not the Fed, and yours is built from the national number plus your credit, down payment, loan type, and property. Points are prepaid interest that lower the rate; whether they're worth it comes down to one division — cost of points divided by monthly savings — compared against how long you'll realistically keep the loan. Buy them for the forever house with seller money if you can; skip them for the starter house or when the cash is your cushion. Lock once you're under contract, and compare lenders on the same day with their Loan Estimates side by side.